Volcano: A weak spot in the crust where molten material or magma, comes through the surface.
Magma: A molten mixture of rock-forming substances, gases, and water from the mantle. (not lava)
Lava: It is magma, but only when it reaches earth's surface
Ring of fire: A belt of volcanoes that rims the pacific ocean.
Island arc: A string of islands created by the volcanoes that are near deep ocean trenches.
Hot spot: An area where magma from the depths of the mantle melts through the crust like a blow torch.
Outline
What is a Volcano?
Weak spot in crust where magma comes out
Location of Volcanoes
all around the world
near islands
ring of fire
Where land meets water
Volcanoes at diverging plate boundaries
along mid-ocean ridge
Hot spot volcanoes
in middle of continental plate
Note: The plate slowly drifts over hot spot so every island is formed by one hot spot
Table of Contents
Volcanoes and Plate Tectonics
Vocabulary:
Volcano: A weak spot in the crust where molten material or magma, comes through the surface.
Magma: A molten mixture of rock-forming substances, gases, and water from the mantle. (not lava)
Lava: It is magma, but only when it reaches earth's surface
Ring of fire: A belt of volcanoes that rims the pacific ocean.
Island arc: A string of islands created by the volcanoes that are near deep ocean trenches.
Hot spot: An area where magma from the depths of the mantle melts through the crust like a blow torch.
Outline
Diagram